Soil respiration patterns during restoration of vegetation in the Shapotou area, Northern China Temporal and spatial variations of soil respiration in Pinus tabulaeformis forest at Huoditang forest zone in the Qinling Mountains, China THE EFFECT OF SOIL VOLUMETRIC WEIGHT ON NITROGEN SUPPLYING ABILITY OF SOIL AND ABSORPTION,UTILIZATION OF NITROGEN BY COTTON Variation of Soil Volumetric Water Content in Grassland and an Oak Forest at Different Depths in a Forest Farm in Nanjing Characteristics of Soil Respiration in Quercus aliena var. acuteserrata Forest and Its Clear-Cutting Site in Dormant Period STUDIES ON THE RELATIONSHIP BETWEEN ROOT GROWTH AND YIELD IN MAIZE (ZEA MAYS)——Ⅱ.The Interaction of Root System and Leaves of Maize and Its Relation with Yield Horizontal impacts of urban constructed bodies or patches on the temperature and moisture patterns in the soil of adjacent green space in urban areas of Beijing